/*手机端实现真正的一像素边框*/
.border-1px, .border-bottom-1px, .border-top-1px, .border-left-1px, .border-right-1px {
    position: relative;
}
/*线条颜色 黑色*/
/*.border-1px::after, .border-bottom-1px::after, .border-top-1px::after, .border-left-1px::after, .border-right-1px::after {*/
    /*background-color: #000;*/

/*}*/

/*底边边框一像素*/
.border-bottom-1px::after {
    content:"";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 1px;
    transform-origin: 0 0;
}

/*上边边框一像素*/
.border-top-1px::after {
    content:"";
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 1px;
    transform-origin: 0 0;
}

/*左边边框一像素*/
.border-left-1px::after {
    content:"";
    position: absolute;
    left: 0;
    top: 0;
    width: 1px;
    height: 100%;
    transform-origin: 0 0;
}

/*右边边框1像素*/
.border-right-1px::after {
    content: "";
    box-sizing: border-box;
    position: absolute;
    right: 0;
    top: 0;
    width: 1px;
    height: 100%;
    transform-origin: 0 0;
}

/*边框一像素*/
.border-1px::after {
    content: "";
    box-sizing: border-box;
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    border: 1px solid #dedede;
}

/*设备像素比*/
@media only screen and (-webkit-min-device-pixel-ratio: 2.0), only screen and (min-resolution: 2dppx) {
    .border-bottom-1px::after, .border-top-1px::after {
        transform: scaleY(0.5);
    }

    .border-left-1px::after, .border-right-1px::after {

        transform: scaleX(0.5);
    }
    .border-1px::after {
        width: 200%;
        height: 200%;
        transform: scale(0.5);
        transform-origin: 0 0;
    }
}

/*设备像素比*/
@media only screen and (-webkit-min-device-pixel-ratio: 3.0), only screen and (min-resolution: 3dppx) {
    .border-bottom-1px::after, .border-top-1px::after {
        transform: scaleY(0.333);
    }
    .border-left-1px::after, .border-right-1px::after {
        transform: scaleX(0.333);
    }
    .border-1px::after {
        width: 300%;
        height: 300%;
        transform: scale(0.333);
        transform-origin: 0 0;
    }
}